A wind tunnel and full-scale study of turbulent wind pressures on a tall building = Etude en soufflerie et a grande \ue9chelle des pressions de vents turbulents sur un \ue9 difice \ue9lev\ue9

This paper describes a method for simulating the natural wind boundary layer in a conventional, short working section, aeronautical wind tunnel. The boundary layers, which may be as thick as one-half of the working section height, are generated by spires at the working section inlet. This approach has been used to measure mean wind pressures and pressure spectra on a model of a tall building in downtown Montreal. The same measurements have been repeated using the long roughness fetch technique for boundary layer generation and the results from the two methods are compared. An extensive program of full-scale measurements of wind pressures has been completed on the Montreal building. These data are reviewed and a comparison is made between full-scale and model values of mean wind pressures and pressure spectra.La pr\ue9sente \ue9tude d\ue9crit une m\ue9thode qui reproduit la couche limite naturelle du vent dans une soufflerie \ue0 section courte. Des tours \ue0 l'entr\ue9e de la section produisent des couches limites pouvant atteindre la moiti\ue9 de la hauteur de la section. Le proc\ue9d\ue9 a \ue9t\ue9 utilis\ue9 en vue d'\ue9valuer les pressions moyennes du vent et les gammes de pressions exerc\ue9es sur le mod\ue8le d'un \ue9difice situ\ue9 dans le centre-ville de Montr\ue9al. On a r\ue9p\ue9t\ue9 les m\ueames mesures en se servant de la technique du rep\ue9rage de la rugosit\ue9 longue appliqu\ue9e \ue0 la production des couches limites. Enfin, on compare les r\ue9sultats des deux m\ue9thodes. On a termin\ue9 un vaste programme de mesure \ue0 grande \ue9chelle des pressions du vent sur l'\ue9difice montr\ue9alais. Les auteurs examinent les donn\ue9es obtenues et comparent les valeurs, \ue0 grande \ue9chelle et en soufflerie, des pressions moyennes du vent et des gammes de pressions.Peer reviewed: YesNRC publication: Ye